just sod the built in 1 buy a fillin loop drain the heatin off with the cold mains tee it in from the cold main to the return use compresion tees if you cant solder eassssy peasy m8,,also while its drained down you shud put a magna clean filter cuz obviously the system/boiler is full of magnatite/sludge..youl get no end of truble with blockages otherwise with heat exchanger/domestic heat exchanger/divertor an pump..fillin loops bout £10 magna clean filter £85 thats simples aswell cut out a section of pipe under the boiler on the return put the filter in its just 2 valves with a jar on them with a magnate in it sits inline picks up all the muck!! save you mney and hassle trust me!!
toke, September 2009
